Rogowski coil



FIG. 1 is a front elevation view of a Rogowski coil showing our new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a lower front right perspective view thereof; and,

FIG. 6 is an enlarged fragmental partial perspective view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a Rogowski coil, as shown and described. 